| 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * beep implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 2009 Bernhard Reutner-Fischer
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| 6 | *
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| 7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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| 8 | *
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| 9 | */
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| 10 |
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| 11 | //usage:#define beep_trivial_usage
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| 12 | //usage: "-f FREQ -l LEN -d DELAY -r COUNT -n"
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| 13 | //usage:#define beep_full_usage "\n\n"
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| 14 | //usage: " -f Frequency in Hz"
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| 15 | //usage: "\n -l Length in ms"
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| 16 | //usage: "\n -d Delay in ms"
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| 17 | //usage: "\n -r Repetitions"
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| 18 | //usage: "\n -n Start new tone"
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| 19 |
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| 20 | #include "libbb.h"
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| 21 |
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| 22 | #include <linux/kd.h>
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| 23 | #ifndef CLOCK_TICK_RATE
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| 24 | # define CLOCK_TICK_RATE 1193180
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| 25 | #endif
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| 26 |
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| 27 | /* defaults */
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| 28 | #ifndef CONFIG_FEATURE_BEEP_FREQ
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| 29 | # define FREQ (4000)
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| 30 | #else
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| 31 | # define FREQ (CONFIG_FEATURE_BEEP_FREQ)
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| 32 | #endif
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| 33 | #ifndef CONFIG_FEATURE_BEEP_LENGTH_MS
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| 34 | # define LENGTH (30)
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| 35 | #else
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| 36 | # define LENGTH (CONFIG_FEATURE_BEEP_LENGTH_MS)
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| 37 | #endif
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| 38 | #define DELAY (0)
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| 39 | #define REPETITIONS (1)
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| 40 |
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| 41 | int beep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 42 | int beep_main(int argc, char **argv)
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| 43 | {
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| 44 | int speaker = get_console_fd_or_die();
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| 45 | unsigned tickrate_div_freq = tickrate_div_freq; /* for compiler */
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| 46 | unsigned length = length;
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| 47 | unsigned delay = delay;
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| 48 | unsigned rep = rep;
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| 49 | int c;
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| 50 |
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| 51 | c = 'n';
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| 52 | while (c != -1) {
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| 53 | if (c == 'n') {
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| 54 | tickrate_div_freq = CLOCK_TICK_RATE / FREQ;
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| 55 | length = LENGTH;
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| 56 | delay = DELAY;
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| 57 | rep = REPETITIONS;
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| 58 | }
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| 59 | c = getopt(argc, argv, "f:l:d:r:n");
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| 60 | /* TODO: -s, -c:
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| 61 | * pipe stdin to stdout, but also beep after each line (-s) or char (-c)
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| 62 | */
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| 63 | switch (c) {
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| 64 | case 'f':
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| 65 | /* TODO: what "-f 0" should do? */
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| 66 | tickrate_div_freq = (unsigned)CLOCK_TICK_RATE / xatou(optarg);
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| 67 | continue;
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| 68 | case 'l':
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| 69 | length = xatou(optarg);
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| 70 | continue;
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| 71 | case 'd':
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| 72 | /* TODO:
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| 73 | * -d N, -D N
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| 74 | * specify a delay of N milliseconds between repetitions.
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| 75 | * -d specifies that this delay should only occur between beeps,
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| 76 | * that is, it should not occur after the last repetition.
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| 77 | * -D indicates that the delay should occur after every repetition
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| 78 | */
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| 79 | delay = xatou(optarg);
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| 80 | continue;
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| 81 | case 'r':
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| 82 | rep = xatou(optarg);
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| 83 | continue;
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| 84 | case 'n':
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| 85 | case -1:
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| 86 | break;
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| 87 | default:
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| 88 | bb_show_usage();
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| 89 | }
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| 90 | while (rep) {
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| 91 | //bb_error_msg("rep[%d] freq=%d, length=%d, delay=%d", rep, freq, length, delay);
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| 92 | xioctl(speaker, KIOCSOUND, (void*)(uintptr_t)tickrate_div_freq);
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| 93 | usleep(1000 * length);
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| 94 | ioctl(speaker, KIOCSOUND, (void*)0);
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| 95 | if (--rep)
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| 96 | usleep(1000 * delay);
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| 97 | }
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| 98 | }
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| 99 |
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| 100 | if (ENABLE_FEATURE_CLEAN_UP)
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| 101 | close(speaker);
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| 102 | return EXIT_SUCCESS;
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| 103 | }
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| 104 | /*
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| 105 | * so, e.g. Beethoven's 9th symphony "Ode an die Freude" would be
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| 106 | * something like:
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| 107 | a=$((220*3))
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| 108 | b=$((247*3))
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| 109 | c=$((262*3))
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| 110 | d=$((294*3))
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| 111 | e=$((329*3))
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| 112 | f=$((349*3))
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| 113 | g=$((392*3))
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| 114 | #./beep -f$d -l200 -r2 -n -f$e -l100 -d 10 -n -f$c -l400 -f$g -l200
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| 115 | ./beep -f$e -l200 -r2 \
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| 116 | -n -d 100 -f$f -l200 \
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| 117 | -n -f$g -l200 -r2 \
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| 118 | -n -f$f -l200 \
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| 119 | -n -f$e -l200 \
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| 120 | -n -f$d -l200 \
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| 121 | -n -f$c -l200 -r2 \
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| 122 | -n -f$d -l200 \
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| 123 | -n -f$e -l200 \
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| 124 | -n -f$e -l400 \
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| 125 | -n -f$d -l100 \
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| 126 | -n -f$d -l200 \
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| 127 | */
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